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为掌握坡面尺度不同植被类型土壤干层特征,对一典型坡面干层空间分布进行了研究。结果表明:13a杏树地和25a柠条地干层厚度分别在0～400和280～400cm之间,杏树地不同坡位处干层分布有明显差异;在坡面垂直方向上,25a柠条地较13a杏树地土壤水分亏缺严重。而水平方向,13a杏树地干层分布表现为明显的片状和斑块状分布特征,同时呈现出从北至南沿坡面逐渐递减,干层分布受植被,降水、坡位、微地形等因素共同作用。相比之下,25a柠条地干层分布结构性较为单一,干层厚度在381～400cm的面积分布较广且连在一起,表现出由植被控制的分布格局。相关结果可为黄土区土壤干层调控提供参考。
To understand the features of soil dry layer on different vegetation types on slope scale, the spatial distribution of dry layer on a typical slope was studied. The results showed that the dry layer thicknesses of the almond tree land and the 25a Caragana land were between 0 ~ 400 and 280 ~ 400 cm, respectively. There was a significant difference in the dry layer distribution between different slope positions of the almond tree. In the vertical direction of the slope, 25a The land is more severely apricot soil water deficit. In the horizontal direction, the distribution of dry layer of apricot trees in 13a showed obvious patchy and patchy distribution, while the slope gradually decreased from north to south. The dry layer distribution was affected by vegetation, precipitation, slope position, microtopography And other factors work together. In contrast, the distribution of dry layer distribution in 25a kale was relatively simple, and the area of 381-400 cm dry layer was distributed widely and linked together, showing the distribution pattern controlled by vegetation. The results may provide reference for the regulation of soil dry layer in loess area.